I too went through this. It took me a long time to recover because it was done in a bad way. I developed a self-care routine, and made myself stick to it. I suffered a lot, but I got through it. I worked outside a lot, gardened, bought chicks and built coops, started selling eggs, cried, felt like shit, listened to books on tape while coloring, meditated, medicated, took care of my appearance, ate good foods. If you can do one thing a day to get better, soon you will be able to do two, then more.
It's going to take time. I also started a journal where I wrote to him every day. Not that he would get them, but part of his therapy was to have me write something to him every day, then send it once a week. That was not a good idea. It really blurred the lines between therapist and friend. Anyway, I continued to do this after he left, and it did make a difference. It's been 2 1/2 years, I think, and I haven't written in the journal for 6 months. Since he is well known in this area, and loved by all his colleagues, I don't feel as if I can process this with anyone. The one therapist I saw that didn't know him wanted to report him for things I won't say on this board. I said no, but he said he would talk to his supervisor and he would do what he needed to do and I didn't have to worry. That made it worse.
I empathize with what you are going through, and hope you are able to process this and come out stronger.